<template>
    <h1>App</h1>
    <breadCrumb :data="data"></breadCrumb>
    <router-view></router-view>
</template>
<script setup>
import { ref, getCurrentInstance, onMounted } from 'vue';
let data = ref([])

onMounted(() => {
    let instance = getCurrentInstance() //获取组件实例

    console.log(instance);

    //获取app全局添加的属性
    let $bus = instance.appContext.config.globalProperties.$bus;
    $bus.$on('breadChange', input => {
        // console.log(input)
        data.value = input;
    })
})
</script>